CN110430961A

CN110430961A - Sensor device is used in welding

Info

Publication number: CN110430961A
Application number: CN201880018313.6A
Authority: CN
Inventors: 谷信博; 齐藤洋和; 大西健吾; 野口智弘; 金井大辅
Original assignee: Tachitsune Hisashi; Kyocera Corp
Current assignee: Tachitsune Hisashi; Kyocera Corp; Daihen Corp; Kyocera Optec Co Ltd
Priority date: 2017-03-17
Filing date: 2018-03-16
Publication date: 2019-11-08
Anticipated expiration: 2038-03-16
Also published as: EP3597346B1; US20200047274A1; EP3597346A1; WO2018169049A1; JP7060576B2; CN110430961B; JPWO2018169049A1; US11717904B2; EP3597346A4

Abstract

From the radiant heat of workpiece when welding, the problem of causing the endurance quality for making sensor unit and detection accuracy to reduce.Welding sensor device 1 has sensor unit 2, accommodating case 3 and curtain-shaped cover member 5.Sensor unit 2 is the device of the shape for measuring workpiece W or the distance to workpiece W.Accommodating case 3 accommodates sensor unit 2, and is formed with the projection for passing through the laser L1 from projection unit 21 and the laser L2 towards test section 22 and uses through portion 36a, detection with by portion 36b.Curtain-shaped cover member 5 is mounted on accommodating case 3, and when covering workpiece W welding among generated radiant heat towards 3 downside of accommodating case 3 surface of accommodating case radiant heat.Curtain-shaped cover member 5 is made of the low material of the material of thermal conductivity ratio accommodating case 3.

Description

Sensor device is used in welding

Technical field

The present invention relates to a kind of welding sensor devices for being appropriate for workpiece welding.

Background technique

In the past, the workpiece such as a pair of of iron plate with bevel shape are carried out with the weldering of butt welding etc. by arc welding etc. When connecing, by welding torch close to workpiece (part of the bevel shape of docking).In this state, to before the welding wire supplied from welding torch Apply voltage between end and workpiece, generates electric arc between them.In this way, wire melting, workpiece are heated and melt, energy It is enough to be welded to one another workpiece.

When being welded, the shape of the distance between welding torch and workpiece or workpiece brings shadow to the welding quality of workpiece It rings.According to this, such as among patent document 1, about the motion of the welding sensor device of measurement workpiece shapes.

Welding disclosed in patent document 1 has with sensor device: projecting the projection unit of laser；And it detects from workpiece The test section of the laser of surface reflection, the welding measure the shape of workpiece with sensor device according to laser detected.It throws It penetrates portion and test section is contained in accommodating case (receiving portion), which is made of shell (box main body) and protection cap.In protection cap It is formed with shielding portion, the splash which generates when welding.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2004-195502 bulletin

Summary of the invention

Problems to be solved by the invention

According to the welding sensor device of patent document 1, by shielding portion, can reduce from weld part towards containing body Splash attachment.But the welding sensor device, since the protection cap of shielding portion and receiving portion is integrally formed simultaneously It is constructed from the same material, so the radiant heat from workpiece from shielding portion is transmitted to protection cap entirety when welding, and passes through receiving Portion is transmitted as readily to its internal sensor unit for having projection unit and test section.By transmit come heat, sensor list Member is heated above heat resisting temperature, and not only the endurance quality of sensor unit cannot be ensured that, but also due to sensor unit It is thermally expanded with the component installed, the installation condition of sensor unit also changes, and makes the inspection of sensor unit Precision is surveyed to become difficult to ensure.

What the present invention completed in view of the above problems, its purpose is to provide be difficult to when a kind of welding by from workpiece direction The welding sensor device of the radiation heat affecting of sensor unit.

The means to solve the problem

Inventor is by repeatedly research has found the following contents without single devotion: by shield and accommodating case (protection Lid) it is integrally formed in the case where, since accommodating case (protection cap) and shield are formed by identical material, accommodating case is uniform Ground heating.Then, inventor obtains following conclusions: the curtain-shaped cover member of setting and accommodating case not homomorphs, by the material of curtain-shaped cover member Material is selected as the material for being difficult to conduct heat, from workpiece towards the influence of the radiant heat of sensor unit when reducing welding with this.

The present invention is that inventor completes according to new discovery, welding according to the present invention with sensor device at least Have: sensor unit, the sensor unit measure the state of welding workpiece or the distance to the workpiece；And has and hold Receive the containing body of portion and shielding portion, which accommodates the sensor unit, and workpiece described in the shielding part shields welds when institute Towards the radiant heat of described accommodation section among the radiant heat of generation, the shielding portion is low by the material of thermal conductivity ratio described accommodation section Material constitute.

According to the present invention, it is made of due to shielding portion the low material of the material of thermal conductivity ratio receiving portion, so can reduce Receiving portion is transmitted to towards the radiant heat of shielding portion.In other words, shielding portion of the invention and shielding portion be by with receiving portion ( Each section) identical material the case where constituting compares, and since radiant heat is difficult to be transmitted to shielding portion, (heat is difficult to be transmitted to shielding portion Inside), so the sensor unit inside receiving portion is difficult to the influence by radiant heat.Thereby, it is possible to ensure sensor list The detection accuracy of member.In addition, " state of workpiece " described in the present invention refers to, the shape including the workpiece before welding or after welding Shape or be formed in workpiece molten state weld part (molten bath) molten state or weld part shape etc. the meaning.

Mode more preferably, using described accommodation section as accommodating case, the shielding portion is mounted in the accommodating case Curtain-shaped cover member, be formed with plate-like portion and mounting portion in the curtain-shaped cover member, the plate-like portion is in a manner of covering the radiant heat And extend, the mounting portion is at the back side of the plate-like portion for the opposite side for being located at the workpiece weld side, by the curtain-shaped cover member It is mounted on the accommodating case, in the back side of the plate-like portion, the curtain-shaped cover member is mounted on described by the mounting portion Accommodating case.

It is hidden according to which due to the back side in the opposite side of workpiece weld side, the plate-like portion of namely curtain-shaped cover member The mounting portion for covering component is mounted on accommodating case, so, the installation position for installing curtain-shaped cover member and accommodating case will not be directly exposed to Radiant heat.Radiant heat is difficult to be transmitted to accommodating case as a result, and the sensor unit for being contained in accommodating case is difficult to be heated.

Here, in the state that curtain-shaped cover member is mounted on accommodating case, although the plate-like portion of curtain-shaped cover member and accommodating case can To contact, but mode more preferably, in the state that the curtain-shaped cover member is mounted on the accommodating case, in the screening It covers and is formed with gap between the plate-like portion of component and the accommodating case.According to which, pass through the plate in curtain-shaped cover member The gap formed between portion and accommodating case, it is heat-insulated between the plate-like portion and accommodating case of curtain-shaped cover member.It is transmitted to shielding portion as a result, The radiant heat of part is difficult to be transmitted to accommodating case from curtain-shaped cover member, and the sensor unit for being contained in accommodating case is difficult to be heated.

As described above, the back side of the plate-like portion in curtain-shaped cover member, if the mounting portion of curtain-shaped cover member is mounted on accommodating case, Then its mounting structure is not particularly limited, but mode more preferably, by the mounting portion of the curtain-shaped cover member When as the first mounting portion, the installation curtain-shaped cover member is formed in the back side towards the plate-like portion in the accommodating case The second mounting portion, first mounting portion and second mounting portion be formed with insert installation axis through hole, it is described Curtain-shaped cover member by the way that the axis to be inserted to the through hole of the mounting portion and the through hole of the accommodating case, and is installed In the accommodating case.

According to which, since curtain-shaped cover member is and the through hole by the through hole of axis insert mounting portion and accommodating case It is mounted on accommodating case, so can easily insert axis in through hole from the side side of accommodating case.In addition, due to being transmitted to A part of the radiant heat of curtain-shaped cover member is transmitted to accommodating case by axis, be difficult to for delivery to the radiant heat of curtain-shaped cover member from screening It covers component and is transmitted to accommodating case, the sensor unit for being contained in accommodating case is difficult to be heated.

As preferred mode the case where using installation axis, the through hole of first mounting portion and described Among the through hole of second mounting portion between the through hole and the axis of at least one party, it is formed with gap.According to which, Due to being formed between the through hole and axis of at least one party among the through hole of the first mounting portion and the through hole of the second mounting portion Gap can discharge the heat from curtain-shaped cover member by the gap so the contact area with axis can be reduced.In particular, If forming gap in workpiece weld side, the space for being formed with the gap is worked as insulated space, can be further Ground reduces the heat transmitting from curtain-shaped cover member towards accommodating case.

In addition, the above-mentioned gap being formed between accommodating case and curtain-shaped cover member, can also be fixed on appearance for curtain-shaped cover member It is formed in the state of case, the structure for being used to form the gap is not particularly limited.But mode more preferably, In The accommodating case is equipped with elastomeric element, and the elastomeric element will in the state that the curtain-shaped cover member is mounted on the accommodating case The curtain-shaped cover member exerts a force to the workpiece weld side, in the state that the curtain-shaped cover member is exerted a force using the elastomeric element Under, the gap is formed between the accommodating case and the plate-like portion of the curtain-shaped cover member.

According to which, since curtain-shaped cover member being exerted a force by elastomeric element, in the plate-like portion of accommodating case and curtain-shaped cover member Between be formed with gap, such as even if external force is applied to curtain-shaped cover member, can be stablized by the recuperability (force) of elastomeric element Ground forms the gap.

In particular, among the through hole of the first mounting portion and the through hole of the second mounting portion the through hole of at least one party with In the case where being formed with gap between axis, the position in the gap between through hole and axis can be stably kept.

Mode more preferably, if the curtain-shaped cover member is made of the low material of the material of thermal conductivity ratio receiving portion, It is then not particularly limited, but the more preferably curtain-shaped cover member is made of ceramic material.Compared to other materials, ceramic material tool Heat resistance and be the low material of thermal conductivity, so more suitably can be covered heat using curtain-shaped cover member.

Since ceramic material is fragile material, if curtain-shaped cover member is easy to happen in curtain-shaped cover member the effects of impact load The breakage of shortcoming etc..But the padded coaming in the case where elastomeric element is arranged, due to the elastomeric element as curtain-shaped cover member And work, so being able to suppress the breakage of curtain-shaped cover member.

As mode still more preferably, the sensor unit at least has test section, the test section self-brazing in future The light for connecing workpiece surface is detected as detection light, and the accommodating case has box main body and protection cap, which accommodates institute State sensor unit and be formed at least one for passing through the detection light towards the test section by portion, protection cap tool Have make the light transmissive protection board of the detection and by by the protection board cover it is described by portion in the way of be mounted on it is described Box main body, the curtain-shaped cover member are mounted on the protection cap.

According to which, due to being covered with the protection board of protection cap by portion, so being able to suppress the cigarette generated when welding The inside by entering box main body by portion such as dirt.Moreover, because curtain-shaped cover member is mounted on box main body by protection cap, So the heat of curtain-shaped cover member will not directly be transmitted to box main body.The biography of box main body is contained in when thereby, it is possible to reduce welding The temperature of sensor cell rises.

Here, as described above, being formed with the state in gap between the plate-like portion and accommodating case of curtain-shaped cover member, it can be The plate-like portion and accommodating case Entirely contactless state of curtain-shaped cover member, are also possible to the state that part of it is in contact.But conduct Preferred mode, in the state that the curtain-shaped cover member is mounted on the accommodating case, in the plate of the curtain-shaped cover member The gap is formed between shape portion and the protection cap, and in the end in the direction for leaving the workpiece of the plate-like portion and It is in contact with the protection cap, the gas flow path for flowing gas internally is formed in the protection cap, in the gas stream Road forms oriented single direction and extends multiple fins.

According to which, it is ensured that above-mentioned gap and in the end in the direction for leaving the workpiece of the plate-like portion and with institute It states protection cap to be in contact, so curtain-shaped cover member can be stably installed, also, heat is difficult to be transmitted to protection from curtain-shaped cover member Lid.It adds, the heat for being transmitted to protection cap from curtain-shaped cover member is formed on the fin release of gas flow path, by fin release Heat is flowing in the gas release of gas flow path.As a result, the temperature of protection cap is difficult to increase, sensor unit is difficult to be added Heat.

And, if it is possible to cooling protection lid, although in gas flow path the flow direction of gas and fin formation direction It is not particularly limited, but mode more preferably, relative to the welding sensor device, by the protection cap The surface positioned at the workpiece weld side as before the protection cap, using the surface of its opposite side as the protection cap The back side when, the end of the plate-like portion is abutted against with the front of the protection cap, and the gas flow path is with gas It is formed from the front side of the protection cap mode that rearwardly side is flowed, the fin is supported or opposed from the front side of the protection cap Surface side extends.

According to which, due to gas flow path in such a way that gas is from the front side of protection cap rearwardly side flowing shape At so the heat come from the plate-like portion end transmitting being in contact effectively can be discharged before protection cap.Moreover, Fin due to being formed in gas flow path also extends from side before the high protection cap of temperature to the low back side of temperature, so energy It is enough more effectively to discharge the heat for being transmitted to fin.

Mode more preferably is provided with separator, the separator between the box main body and the protection cap The box main body described in thermal conductivity ratio and the low material of the material of the protection cap are constituted.According to which, due to separator and It is made of the low material of thermal conductivity, so can reduce the heat for being transmitted to box main body by separator from protection cap.

Mode more preferably, the sensor unit at least have test section, which will come from welding workpiece The light on surface is detected as detection light, the sensor unit, the detection light detected by the test section, to measure The state of the workpiece or from the test section to the distance of the workpiece, the welding sensor device has box main body And protection cap, the box main body accommodate the sensor unit and being formed with make the detection light towards the test section pass through to Few one by portion, which has and makes the light transmissive protection board of the detection and using described in protection board covering The box main body is mounted on by way of portion, the protection cap has: the case with the protection board；And keep institute It states case and is mounted on the holder of the box main body, it is described in the state that the holder is mounted on the box main body Case detachably engages relative to the holder.

According to which, since protection cap is pacified by the way of covering the transmissible protection board of detection light by portion Mounted in box main body, so portion can be passed through using protection board protection.Here, protection board is assemblied in case, the case is detachable Ground is fastened on the holder for being installed on box main body, and is kept by the holder.Then, box main body is mounted on later again to fill case It unloads, can easily be replaced protection board and case together with this, can be improved the maintainability of device.

Here, snap-in structure is not special if case can engage relative to holder and detachably The protection cap is being located at welding relative to the welding sensor device by limitation, but mode more preferably The welder of the workpiece setting side surface as before the protection cap, using the surface of its opposite side as described in When the back side of protection cap, in the state of being kept by the holder, the case with relative to the holder from the guarantor The front side of protecting cover rearwardly Slideslip and engage from the mode that the holder can be extracted with the holder.

According to which, relative to holder, can by case before protection cap side to being difficult to be heated when welding Back side Slideslip.Then, it is not required to mind remaining heat after welding, from back side lower than other parts when welding by case It is promptly pulled out from holder, protection cap can be replaced.

Here, case can also detachably block with the receiving recess portion that is formed in either holder or box main body It closes.But mode more preferably, in the state that the holder is mounted on the box main body, in the holder and Between the box main body, it is formed with the receiving recess portion for accommodating the case, is formed in the receiving recess portion at the back side It is inserted into the insert port of the case.

According to which, such as when taking out case from device, pass through accommodating recess portion even if case is stuck The holder of protection cap is removed from box main body, case can expose, and can easily remove case from device.Moreover, energy It is enough to confirm whether case is inserted in receiving recess portion from the back side for being formed with insert port.

But since protection board is transmissive to laser, so confirmation protection board is with the presence or absence of more difficult in case.From this Viewpoint, mode more preferably, the case have the case main body for keeping the protection board, keep by the protection board In the state of the case main body, the observation portion that whether there is for observing the protection board is formed in the protection board.

According to which, due to being formed with observation portion in protection board, so can easily verify that whether protection board keeps In case main body.Thereby, it is possible to prevent from forgetting for protection board to be mounted on case main body.

In addition, mode more preferably, in the state that the case is maintained at the holder, in the box master Body is provided with the plate detection sensor for detecting the protection board.In this way, even if protection board is not mounted on case main body And case is maintained to the holder for being installed on box main body, it is able to confirm that protection board is not present in case using plate detection sensor The case where.

In addition, the observation portion is to be coated with metal in the protection board as plate detection sensor preferred mode The part of material, the plate detection sensor are to detect the sensor in the observation portion.

According to which, the observation portion due to being formed in protection board is made of metal material, so being able to confirm that depositing for plate Moreover, the observation portion works as detecting test section existing for protection board.As a result, observation portion undertake observation and Two functions of detection, can make apparatus structure become simple.

Above-mentioned plate detection sensor, such as can be the sensor using laser, magnetism or ultrasonic wave etc., but as more Preferred mode, the plate detection sensor are by reflecting to the observation portion irradiating and detecting laser and by the observation portion Detection the sensor that the protection board whether there is is detected with this with laser detection, be formed through in the case main body Hole, the through hole pass through the detection laser of irradiation in the state of not keeping the protection board and by institutes It states and is located at the position covered by the observation portion in the state that protection board is kept, the holder, should with reflecting part is prevented Prevent reflecting part from preventing from reflecting by the detection laser of the through hole towards the plate detection sensor.

According to which, when case main body and protection board are installed along with welding sensor device, plate detection is passed The detection laser in the observation portion of the detection of sensor laser irradiation to protection board, the reflection of observation portion is anti-to plate detection sensor It penetrates.The presence of protection board can be judged by plate detection sensor as a result,.

On the other hand, when case main body is not installed on welding sensor device, although the inspection of plate detection sensor Survey laser irradiation but is preventing reflecting part to the reflecting part that prevents of holder, will not reflect detection to plate detection sensor and use Laser.It can judge that protection board is not present by plate detection sensor as a result,.Equally, protection board case be not maintained at When main body, although the detection laser of plate detection sensor, which is irradiated to holder by the through hole of case, to be prevented from reflecting Portion, but reflecting part is being prevented, detection laser will not be reflected to plate detection sensor.It as a result, can by plate detection sensor Judge that protection board is not present.Like this, case main body is whether installed, prevents reflecting part from can judge protection board by one It is not present, so apparatus structure becomes simpler.

The effect of invention

According to the present invention, by the low curtain-shaped cover member of setting thermal conductivity ratio accommodating case, radiant heat is difficult to pass through screening when welding It covers component and is transmitted to the sensor unit for being contained in accommodating case from workpiece.

Brief Description Of Drawings

The welding sensor device that Fig. 1 is involved in embodiment of the present invention, is mounted under welder state Side view.

Perspective view when Fig. 2 is from welding sensor device shown in unilateral observation Fig. 1.

Perspective view when Fig. 3 is welding sensor device shown in Fig. 1 from the other side.

Fig. 4 is the exploded perspective view of the sensor device of welding shown in Fig. 3, is that the lid of box main body is removed to standing for state Body figure.

Perspective view when Fig. 5 is the box main body of welding sensor device shown in Fig. 4 from bottom surface side.

Fig. 6 is the exploded perspective view of protection cap shown in Fig. 4.

Fig. 7 is the enlarged side view that inducing component shown in Fig. 2 is removed to the welding sensor device of state.

Fig. 8 is the side view of welding sensor device shown in Fig. 1.

Fig. 9 is the side view of the curtain-shaped cover member of welding sensor device shown in Fig. 1.

Figure 10 is the perspective view of the curtain-shaped cover member shown in Fig. 9 from back side.

Figure 11 is the sectional view for indicating the installation condition of curtain-shaped cover member shown in Fig. 9.

Figure 12 is the bottom view that curtain-shaped cover member shown in Fig. 9 is removed to the welding sensor device of state.

Figure 13 is the perspective view for removing the case of the sensor device of welding shown in Fig. 3.

Figure 14 is the perspective view that bottom surface side observes case shown in Figure 13.

Figure 15 is the top view that box main body shown in Fig. 4 is removed to the welding sensor device of state.

Figure 16 A is the sectional view of the line A-A along Figure 15.

Figure 16 B is the sectional view that case is removed to from welding shown in Figure 16 A with sensor device state.

Figure 16 C is the sectional view that protection cap is not mounted on to the case state of welding sensor device shown in Figure 16 A.

The specific embodiment of invention

Hereinafter, referring to figs. 1 to Figure 16 C to sensor device (the following letter of welding involved in embodiments of the present invention Referred to as sensor device) it is described in detail.

1. about the installation condition of sensor device 1 and the overall structure of sensor device 1

As shown in Figure 1, sensor device 1 involved in present embodiment, is installed on welding dress by installation fixture 8 Set 9.The welding torch 91 of welder 9 is fed with welding wire 93.Front end and workpiece W when welding, to the welding wire 93 supplied from welding torch 91 Between apply voltage, electric arc A is generated between them with this.In this way, welding wire 93 and workpiece W fusing, generate molten in workpiece W Pond P is able to carry out the welding of workpiece W.Workpiece is W-shaped at there is molten bath P, by the mobile welder 9 in direction shown in Fig. 1 arrow, in work Part W forms weld part (welding bead) B each other.In addition, by workpiece W convenience describe as a workpiece in Fig. 1, still, It is to carry out butt welding, fillet welding, overlap welding etc. each other to more than two workpiece.Welding method is not particularly limited.In addition, Among present embodiment, the mutual welding of workpiece is defined as the arc welding using welding wire, in addition to this, or for example Other welding such as TIG weld, electron beam welding, LASER BEAM WELDING, gas welding.

In order to steadily be welded to workpiece W by welder 9, measurement welding torch 91 is at a distance from workpiece W or workpiece The shape of W is important.Here, as an example, workpiece W is measured by sensor device 1 among present embodiment Shape or distance to workpiece W.

As shown in Figure 1, sensor device involved in present embodiment (sensor head) 1 has: sensor unit 2；With And accommodate the containing body 3A of sensor unit 2.Among present embodiment, containing body 3A has: being equipped with the appearance of protection cap 40 Case (receiving portion) 3；It is installed on the curtain-shaped cover member (shielding portion) 5 of accommodating case 3；And inducing component (induction portion) 6.In this implementation Among mode, accommodating case 3, curtain-shaped cover member 5 and inducing component 6 are the components that can be separated, but they are also possible to be integrally formed Construction.In addition, according to requiring also to can be omitted the inducing component 6 for constituting containing body 3A.

2. about sensor unit 2

Sensor unit 2 is the shape of workpiece W to be measured by laser (detection light) L2 of detection or (from sensor unit 2) to the device of the distance of workpiece W.Among present embodiment, as an example, sensor unit 2 has: to Welder The projection unit 21 of the surface projection laser L1 of part W；And detect the test section 22 of the laser L2 reflected from workpiece surface.Projection unit 21 have: generating the laser light source 21b of laser；And the projection for projecting the laser L1 that laser light source 21b is issued to workpiece W fills Set (optical system) 21a.

Test section 22 has: optical receiver apparatus (optical system) 22a and detection device 22b, and optical receiver apparatus 22a connects The laser L2 for receiving the laser L1 of grenade instrumentation 21a projection and being reflected by workpiece W surface, detection device 22b are detected from light-receiving The laser L2 that device 22a transmission comes.Optical receiver apparatus 22a transmits the received laser L2 of institute to detection device 22b.Detection device 22b, e.g. photographic device (camera), detect laser L2, and the data transmission for the laser L2 that will test to draw a portrait processing unit (not shown), the portrait processing unit are arranged outside sensor device or inside sensor device.Portrait processing unit, measurement The shape (state) of workpiece W or the distance that workpiece W is arrived from sensor unit 2 (, specifically, laser light source 21b), for example, drawing As processing unit converts welding torch 91 according to the distance of measurement at a distance from workpiece W.

In addition, as an example of sensor unit, having projection unit 21 although instantiating among present embodiment With the sensor unit 2 of test section 22, still, such as sensor can also be located at using projection unit as other units The outside of device 1 can be omitted the projection unit 21 of sensor unit 2 with this.In this case, it is filled due to welding with sensor It sets 1 and does not have projection unit 21, so each position (such as projection of aftermentioned box main body 30 of aftermentioned projection can be omitted With projection protection portion 44a etc. by portion 36a, protection board 44).

In addition, among present embodiment, although sensor unit 2 measures the shape of workpiece W using laser L1, L2 (state) or from test section 22 to the distance of workpiece W, still, such as laser can also not be used, and by the example of workpiece W when welding The light as caused by the P of molten bath or from external light source etc. and the light that is reflected by workpiece W, detected as detection light.This In the case of, it also can be omitted the projection unit 21 of sensor unit 2 shown in present embodiment.Test section can also at least have: Receive the optical receiver apparatus (optical system) towards the detection light of workpiece W surface；And it detects from optical receiver apparatus transmission The photographic device (camera) of detection light.If welding does not have projection unit 21 with sensor device 1, aftermentioned projection can be omitted All parts.The data of detection light detected are sent to the portrait outside sensor device or inside sensor device Processing unit (not shown) can measure the state (such as molten state of molten bath P) of workpiece W.It can also be according to measured The state of workpiece W, the application voltage between front end and workpiece W to control the welding wire 93 that welding Shi Cong welding torch 91 supplies.This Outside, ultrasonic wave or electromagnetic wave also can be used to measure the state of welding workpiece W or to the distance of workpiece W in sensor unit.

Moreover, being provided in the state that the case 41 of aftermentioned protection cap 40 is maintained at holder 45 in box main body Detect the plate detection sensor 23 of protection board 44.As it is explained in detail hereinafter, plate detection sensor 23 is if it is being able to detect protection board 44 Existing sensor, be also possible to any sensor using ultrasonic wave, laser or magnetism etc..Among present embodiment, Plate detection sensor 23 is irradiating and detecting laser L, in the presence of protection board 44, by detecting the detection reflected by protection board 44 The sensor for the presence or absence of detecting protection board 44 with laser L.In addition, for example passing through the detection laser L of plate detection sensor 23 It detects the principle of other objects such as protection board 44, is general by the content of public domain, description is omitted herein.

3. about accommodating case 3

Accommodating case 3 accommodates sensor unit 2, and is formed with the laser L1 for issuing projection unit 21 and towards test section 22 Laser L2 pass through by portion (projection referring in particular to Fig. 5 is used through portion 36a and detection with by portion 36b).If passing through portion's energy It enough transmits laser L1 and L2, such as is also possible to open state, opening portion, which can also be covered with, enables laser L1 and L2 The material (for example, transparent resin or glass etc.) of transmission.Among present embodiment, accommodating case 3 have box main body 30 and Protection cap 40 (referring to Fig. 4).

3-1. is about box main body 30

Among present embodiment, box main body 30 is the assembly for accommodating sensor unit 2.Such as Fig. 2 and Fig. 3 institute Show, box main body 30 is to install lid 32a, 32b in the two sides of the basket 31 with the recess portion (not shown) for accommodating sensor unit 2 And formed, lid 32a, 32b is fixed by the fastener 71 and basket 31 of screw etc..Lid 32a positioned at side is Covering accommodates the recess portion of the sensor unit 2.As shown in Figure 4, Figure 5, the lid 32b positioned at the other side passes through sealing element 32c covers basket 31 and forms the first gas flow path 35 of sinuous (serpentine) shape that crawls in box main body 30.By to One gas flow path, 35 supply gas can cool down the sensor unit 2 inside box main body 30, sensor unit 2 when reducing welding Heating.In addition, in figures 4 and 5, indicating the box main body 30 that lid 32b is removed to state.

Here, as supply first gas flow path 35 gas, can enumerate air (atmosphere), helium, argon gas, nitrogen, Carbon dioxide and the mixed gas of these gases etc., when preferred weld can cooling sensor device 1, and be relative to work The weld part of part W has the gas of chemical stability, such as also can use the supply source (not shown) of protection gas for welding The gas supplied.

Specifically, among present embodiment, first gas flow path 35 has the first cooling flowing path 35a, this is first cold But flow path 35a (forms front 30a from the inside that aftermentioned gas supply port 37c initially forms the side 30a before box main body 30 Wall portion inside).First gas flow path 35, with the second cooling stream shunted in diffluence pass 35b from the first midway cooling flowing path 35a Road 35d is connected.Second cooling flowing path 35d is will to be formed in the groove portion 35e of 31 side 35g of basket to pass through sealing element 32c and benefit It is formed with lid 32b covering.In addition, communication port 35c and second gas flow path of the first cooling flowing path 35a in box main body 30 47 are connected.Moreover, the second cooling flowing path 35d is connected with the third cooling flowing path 35f being formed in inside wall portion, the wall portion shape At the back side 30b of box main body 30.Third cooling flowing path 35f is connected with gas discharge outlet 37e.By to first gas flow path 35 Cooling gas is supplied, the sensor unit 2 in box main body 30 is cooled down with this, the liter of sensor unit 2 when can reduce welding Temperature.

It is equipped in the upper surface of box main body 30: the connection terminal 37a of detection signal for output transducer unit 2 etc.； And the connection terminal 37b for being supplied electric power to sensor unit 2 and to 2 input control signal of sensor unit etc..Moreover, It is additionally provided in the upper surface of box main body 30: to the gas supply port 37c of 40 supply gas of first gas flow path 35 and protection cap；With And the gas discharge outlet 37e for discharging gas from first gas flow path 35.In addition, being additionally provided with aobvious in the upper surface of box main body 30 Show the display lamp 37d of the states such as 2 power supply on-off of sensor unit.

As shown in figure 5, in box main body 30, being formed with as by portion in the state of accommodating sensor unit 2: make come The projection passed through from the laser L1 of projection unit 21, which is used, passes through portion 36a；And the detection for passing through the laser L2 towards test section 22 With pass through portion 36b.In addition, in box main body 30, be formed with for confirm aftermentioned case 41 whether there is or not sensor (not shown) inspection It surveys with by portion 36c.Specifically, in box main body 30, have for confirm case 41 whether there is or not the 23 (reference of plate detection sensor Fig. 1), and be formed with pass through the detection laser of plate detection sensor 23 by portion 36c.Among present embodiment, In Box main body 30, although projection is respectively formed with by portion 36a and detection with by portion 36b, but if can ensure sensor list The detection accuracy of member 2, projection can also be formed continuously with by portion 36a and detection with by portion 36b.Present embodiment it In, projection with by portion 36a and detection with by portion 36b be round opening portion be arranged make laser L1, L2 transmission circle The part of plate.

3-2. is about protection cap 40

Protection cap 40 constitutes a part of accommodating case 3, and has protection board 44.Protection cap 40, to be covered using protection board 44 Lid projection, with by way of by portion 36b, passes through the fasteners such as screw 72 from 30 bottom surface side of box main body with portion 36a and detection It is mounted (referring for example to Fig. 4, Fig. 5, Fig. 7, Fig. 9 etc.).More specifically, protection cap 40 has: the case with protection board 44 41；And keep loading and unloading freely the holder 45 of case 41.Holder 45 is mounted on box by fastener 72 from bottom surface side Main body 30 (referring for example to Fig. 7, Fig. 9, Figure 12).

Be formed with front 40a, back side 40b and a pair of horizontal side 40c, 40c in protection cap 40, before this 40a be formed in The opposite position of curtain-shaped cover member 5, back side 40b are formed in the opposite side of front 40a, a pair horizontal side 40c, 40c and front 40a is connected with back side 40b.The back side side 40b of case 41 from protection cap 40 is detachable (referring for example to figure relative to holder 45 4, Fig. 6 etc.).

The holder 45 for constituting protection cap 40 has holder main body 45a and sealing element 45b.In holder main body 45a, with So that gas is flowed to the mode between protection cap 40 and box main body 30 from the first gas flow path 35 for being formed in box main body 30, is formed with Second gas flow path 47 (gas flow path).

As shown in figure 4, being provided with sealing element 45b (the first separator) between box main body 30 and protection cap 40.Sealing element 45b is the component for preventing from flowing in the gas leakage of the second gas flow path 47 of holder main body 45a, flexible and can by having The sheet materials such as the rubber or resin of compressive deformation are constituted.Preferred seal 45b by thermal conductivity ratio box main body 30 and protection cap 40 material Expect that low material is constituted.It can reduce by the way that sealing element 45b is arranged from protection cap 40 to 30 direct heat transfer of box main body with this.

Moreover, being formed through hole 45c, 45d in holder main body 45a and sealing element 45b.It is inserted in through hole 45c, 45d Enter to have cricoid separator 45f.The side that separator 45f is taken a seat with the periphery for being formed through hole 45d with holder main body 45a Formula and be arranged.Like this, four separator 45f are made to be seated at the through hole 45d of holder main body 45a, by making these isolation Part inserts the through hole 45c of sealing element 45b, and sealing element 45b can be arranged in correct position with this.As a result, passing through guarantor The dislocation of sealing element 45b between protecting cover 40 and box main body 30 can be avoided the second gas flow path 47 being formed between them Sealing performance reduction.

Such as inserted in the state of the separator inside 45f by the fasteners such as screw 72, holder 45 passes through fastener 72 are mounted on box main body 30.In addition, being formed with intercommunicating pore 45e in sealing element 45b, intercommunicating pore 45e is for making gas from formation It is flowed in the first gas flow path 35 of box main body 30 to the second gas flow path 47 for being formed in holder main body 45a.

Fig. 7 indicates the state for removing inducing component 6 and case 41 from sensor device 1.Here, separator 45f with it is close Sealing 45b is set to together between box main body 30 and protection cap 40.Using four fasteners 72 by holder 45 and box main body When 30 installation, sealing element 45b compressive deformation in-between.If the tightness (the tightening degree of screw) of four fasteners 72 Difference, then the sealing performance of sealing element 45b can reduce.

So among present embodiment, separator 45f by modular ratio leakproofness 45b high (hardly possible deforms) material It constitutes, in the state that separator 45f is set to box main body 30, separator 45f is preferably with from leakproofness 45b surface indentation Mode and be arranged.As a result, when the holder main body 45a of protection cap 40 is installed on box main body 30 using four fasteners 72, From the separator 45f of leakproofness 45b surface indentation, support leakproofness 45b through-thickness compressive deformation until with box main body 30 It is connected in only.As a result, it is possible to make sealing element 45b equably compressive deformation, the sealing performance of sealing element 45b can be improved.

Moreover, material separator 45f preferably low with the material of protection cap 40 by thermal conductivity ratio box main body 30 is constituted.Example When such as, the case where box main body 30 and protection cap 40 are made of aluminium or stainless steel and other metal materials, separator 45f is by thermal conductivity ratio The low metal material of metal material, resin material or ceramic material are constituted.The case where separator 45f is made of ceramic material When, as its material, can enumerate aluminium oxide, yttrium oxide, silicon carbide, silicon nitride, zirconium oxide, cordierite, cermet, talcum, Mullite, aluminium nitride or sapphire etc..Especially when using the case where ceramic material, due to modular ratio sealing element 45b high, so being more highly preferred to.

Like this, between protection cap 40 and box main body 30, the material that selects their material of thermal conductivity ratio low as every The material of off member 45f and leakproofness 45b, the heat from protection cap 40 are difficult to be transmitted to box main body 30.In addition, institute in the present invention " separator " said, refers to separator 45f and leakproofness 45b both sides among present embodiment.

As shown in fig. 6, being equipped with curved flat spring 49 in a manner of being formed with protrusion 49a in holder 45, passing through plate The protrusion 49a of spring 49 engages with the recess portion 41a of case 41, case 41 can be maintained at holder 45.On the other hand, it is inciting somebody to action When the handle part 41b of case 41 holds and extracts case 41 from holder 45, due to elastic 49 flexible deformations of plate, so The engaging of the recess portion 41a of case 41 and the protrusion 49a of flat spring 49 can easily be released.

Case 41 has a protection board 44, protection board 44 clip 41c in a manner of from the disassembly freely of case main body 42 and It is maintained at case main body 42.The transparent material that the material of protection board 44 preferably transmits laser L1, L2 can be arranged as its material Lift glass, resin etc..Protection board 44 has: the covering projection projection protection portion 44a for passing through portion 36a；And covering detection Has the coating portion (observation portion) for being formed with the metal films such as aluminium foil in-between with by the detection protection portion 44b of portion 36b 44c.By the way that coating portion (observation portion) 44c is arranged, it can easily observe protection board 44 and be arranged in case 41.

Among present embodiment, in the state that case 41 are installed, are used in the projection of box main body 30 and pass through portion 36a and inspection It surveys with by portion 36b, is covered each by projection the protection portion 44a and detection protection portion 44b of protection board 44.Thereby, it is possible to The flue dust etc. generated when inhibition welding is invaded to project and be used with by portion 36a and detection through portion 36b.

Moreover, passing through the gas of slit 47b from pressure accumulating chamber 47a, the irradiation from laser L1 is side-blown to be sent to projection protection portion 44a and detection use protection portion 44b, pressure accumulating chamber 47a as the second gas flow path 47 inside protection cap 40 a part and shape At.Thereby, it is possible to reduce foreign matter to be attached to projection protection portion 44a and detection protection portion 44b.In addition, pressure accumulating chamber 47a is logical Cross the space that case 41 is in contact with 30 part of box main body and is formed.

Here, as shown in fig. 6, being formed with cooling flow path 47e, the cooling edge flow path 47e in second gas flow path 47 40a extends before protection cap 40.Cooling to be connected with flow path 47e with flow path 47f is imported, gas is flowed into from flow path 47f is imported Pressure accumulating chamber 47a is formed with the multiple fin 47m extended along single direction in pressure accumulating chamber 47a.Among present embodiment, as Preferred mode is constituted from the second gas flow path 47 for importing flow path 47f to pressure accumulating chamber 47a, with gas from protection cap 40 The front side 40a is formed to the mode that the back side side 40b is flowed.In pressure accumulating chamber 47a, fin 47m is from the front side 40a to back side 40b Side extends.

Moreover, the second gas flow path 47 in holder 45 is formed with discharge outlet, which will flow in second gas What the gas of flow path 47 was discharged into laser L1 is projected side.Among present embodiment, case 41 is being installed on holder 45 In the state of, discharge outlet is constituted by projecting with discharge outlet 48a and detection with discharge outlet 48b, and projection is that will blow with discharge outlet 48a The mouth discharged to projection with the gas of protection portion 44a, detection is the gas that will be blown into detection protection portion 44b with discharge outlet 48b The mouth of body discharge.

Here, the section of the flow path for flowing gas of detection discharge outlet 48b, makes gas than projection discharge outlet 48a The section of the flow path of body flowing is big.Detection compares projection discharge outlet 48a with discharge outlet 48b, is formed adjacent to aftermentioned masking 5 side of component (referring to Fig.1 2).Flowing is blown into curtain-shaped cover member 5, energy with more gases of discharge outlet 48b in detection as a result, It is enough effectively to cool down curtain-shaped cover member 5 from the back side side 51b.

4. about gas flow path

As described above, among present embodiment, as shown in figure 4, being formed in box main body 30 makes cooling sensor unit 2 Gas flowing first gas flow path 35.Be formed with second gas flow path 47 in protection cap 40, the second gas flow path 47 with First gas flow path 35 is connected, and so that gas nearby makes gas to the mode that the side workpiece W (lower section) is discharged from protection board 44 Body flowing.It is formed with gas supply port 37c and gas discharge outlet 37e in box main body 30, gas supply port 37c is to first gas 35 supply gas of flow path, the gas that gas discharge outlet 37e is fed into first gas flow path 35 are discharged into weldering from box main body 30 Connect the outside with sensor device 1.

The gas supplied from the gas supply port 37c of box main body 30, flows in first gas flow path 35, can cool down welding When be contained in the sensor unit 2 of box main body 30.In addition, since second gas flow path 47 is connected with first gas flow path 35, So the gas of supply is also flowed in second gas flow path 47, and emitted near protection board 44.Thereby, it is possible to prevent from welding The flue dust etc. generated when connecing is flowed into protection board 44.

The second gas flow path 47 being connected with first gas flow path 35, is formed between protection cap 40 and box main body 30, And it is formed in such a way that gas is from the side 40a before protection cap 40 to the flowing of the back side side 40b.It is flowed into from first gas flow path 35 The gas of second gas flow path 47 can be cooled effectively the side 40a before the protection cap 40 for being easy to be heated when welding.Come The gas of the heat of 40a before self-insurance protecting cover 40 is flowed to the back side side 40b of protection cap 40, and attached from protection board 44 Nearly release.The heating of protection cap 40 when thereby, it is possible to inhibit welding.

In second gas flow path 47, is using flow path 47e closer to downstream than cooling, be formed with pressure accumulating chamber 47a.Institute as above It states, pressure accumulating chamber 47a is formed between protection cap 40 and box main body 30.By forming pressure accumulating chamber 47a, in case 41 and box main body 30 Between the space that is formed, the gas pressure inside second gas flow path 47 can be made to stablize.

As shown in Fig. 6 and aftermentioned Figure 16 A, in pressure accumulating chamber 47a, to be flowed from the side that is projected of laser to protection board 44 Mode be formed with make gas flow out slit (venthole) 47b.The pressure stable by pressure accumulating chamber 47a, energy are utilized as a result, It is enough that the gas flowed out from slit 47b is blown into protection board 44.As a result, it is possible to steadily inhibit the foreign matters such as dust to be attached to guarantor Backplate 44.Moreover, the gas flowed out from slit 47b can be discharged using the pressure stable by pressure accumulating chamber 47a, so 2 measurement accuracy of sensor unit is able to suppress to deviate.

In the two sides for the pressure accumulating chamber 47a for clipping protection board 44, slit 47b is formed in protection board 44 and case main body (is kept Component) between 42, specifically, being formed in the position for clipping the projection protection portion 44a of protection board 44 and clipping detection With the position of protection portion 44b.Like this, by the two sides for the pressure accumulating chamber 47a for clipping protection board 44 formed a pair of of slit 47b, Gas can be more uniformly blown into respectively projection protection portion 44a and detection protection portion 44b from opposite side by 47b.

5. about curtain-shaped cover member 5

As shown in figure 8, the curtain-shaped cover member 5 of sensor device 1 is constituted, when workpiece W is welded among generated radiant heat Towards the appearance of 3 lower side of accommodating case (specifically, being formed with projection with by portion 36a and the detection side for passing through portion 36b) The radiant heat H on 3 surface of case is covered.Curtain-shaped cover member 5 will sputter from molten bath P and come and towards 3 lower side table of accommodating case The splash S in face is covered.

Here, curtain-shaped cover member 5 is made of the low material of the material of thermal conductivity ratio accommodating case 3.Among present embodiment, hide Cover component 5 by thermal conductivity ratio accommodating case box main body 30 material and remove protection board 44 protection cap 40 material it is low Material is constituted.Among present embodiment, when the case where box main body 30 and protection cap 40 being made of metal material, curtain-shaped cover member 5 are preferably made of nonmetallic materials such as the thermal conductivity ratio metal material low resin materials or ceramic material.

Curtain-shaped cover member 5 is preferably made of the material with 700 DEG C or more of heat resisting temperature (at least fusing point), more preferably by The material that 700 DEG C or more and mechanical strength are difficult to decrease is constituted.Among present embodiment, further preferred box main body 30 It is made of with protection cap 40 aluminium or stainless steel and other metal materials, curtain-shaped cover member 5 is made of ceramic material.As composition curtain-shaped cover member 5 ceramic material can enumerate aluminium oxide, yttrium oxide, silicon carbide, silicon nitride, zirconium oxide, cordierite, cermet, talcum, not Come stone, aluminium nitride or sapphire etc..

Since curtain-shaped cover member 5 is made of the low material of the material of thermal conductivity ratio accommodating case 3, so can reduce towards masking The radiant heat of component 5 is transmitted to accommodating case 3.In other words, the curtain-shaped cover member 5 of present embodiment, with curtain-shaped cover member by and accommodate The case where box main body 30 and the identical material of protection cap 40 of box 3 are constituted is compared, and radiant heat is difficult to be transmitted to (the heat of curtain-shaped cover member 5 Amount is difficult to be transmitted to the inside of curtain-shaped cover member 5).Then, the sensor unit 2 inside accommodating case 3 is difficult to the shadow by radiant heat It rings, so can ensure the detection accuracy of sensor unit 2.

As shown in Figure 9, Figure 10, it is formed in curtain-shaped cover member 5: the plate-like portion 51 of the radiant heat masking generated when by welding； And curtain-shaped cover member 5 is mounted on to two the first mounting portions 52,52 of accommodating case 3.What plate-like portion 51 generated when being welded with covering The mode of radiant heat and (along masking direction) extend.Among present embodiment, the shape of plate-like portion 51 is tabular, but can also Think that the back side side 51b towards plate-like portion 51 is heaved or the mode that is recessed and curved plate, if it is possible to screening of radiation heat, then its Shape is not particularly limited.Each first mounting portion 52 is formed at the opposite side of the side workpiece W face of weld 51a, plate The back side 51b in shape portion 51.

It is preferred that curtain-shaped cover member 5 is mounted on accommodating case 3 by the first mounting portion 52,52 in the back side side 51b of plate-like portion 51. Radiant heat will not be directly exposed to by installing curtain-shaped cover member 5 and the installation position of accommodating case 3 as a result,.As a result, radiant heat from be easy The installation site of heat transfer is difficult to be directly delivered to protection cap 40, and the sensor unit 2 for being contained in box main body 30 is difficult to be heated.It hides Component 5 is covered, protection cap 40 can also be mounted on as present embodiment.Since curtain-shaped cover member 5 is mounted on by protection cap 40 The heat of box main body 30, curtain-shaped cover member 5 will not be directly delivered to box main body 30.Box master is contained in when thereby, it is possible to reduce welding The temperature of the sensor unit 2 of body 30 rises.

Moreover, in the protection cap 40 (specifically, holder 45) of accommodating case 3, in the back side 51b towards plate-like portion 51 Side is formed with the second mounting portion 46 for installing curtain-shaped cover member 5.In the state that curtain-shaped cover member 5 is mounted on protection cap 40, Second mounting portion 46 is arranged between two the first mounting portions 52,52 of curtain-shaped cover member 5.

In the first mounting portion 52 of curtain-shaped cover member 5 and the second mounting portion 46 of protection cap 40, along the plate of curtain-shaped cover member 5 The extending direction (specifically, transverse direction of sensor device 1) in portion 51, be formed with insert installation axis 73 through hole 52a, 46a.Axis 73 is for example made of metal material or ceramic material.

Curtain-shaped cover member 5, by the way that axis 73 to be inserted to the through hole 52a of a pair of first mounting portion 52 and is formed between them The second mounting portion 46 through hole 46a and be mounted on the protection cap 40 of accommodating case 3.Axis 73 has shaft body 73a and and axis The screw body 73b that main body 73a can be screwed togather freely.By the way that shaft body 73a is inserted from the side side of accommodating case 3 (protection cap 40) Through hole 52a, 46a and then screw body 73b is screwed into shaft body 73a, curtain-shaped cover member 5 can be mounted on by protection cap with this 40。

Among present embodiment, from the two sides of aftermentioned inducing component 6, utilize shaft body 73a's and screw body 73b Head 73c, 73d can clamp the inducing component 6.Here, head 73c, 73d of axis 73 are extremely when from workpiece W weld side Few a part or the whole size and shape that curtain-shaped cover member 5 can also be set in the hidden mode of shielded component 5.As a result, It can reduce the influence of the radiant heat towards axis 73.

In this way, it is transmitted to a part of the radiant heat of curtain-shaped cover member 5, the protection of accommodating case 3 is transmitted to by axis 73 Lid 40.The radiant heat for being transmitted to curtain-shaped cover member 5 as a result, is difficult to be transmitted to accommodating case 3 from curtain-shaped cover member 5, is contained in accommodating case 3 Sensor unit 2 is difficult to be heated.

As shown in figure 11, in through hole 52a, 46a and axis 73 (shaft body 73a) of the first and second mounting portions 52,46 Between, it is formed with clearance D 1, D3.Specifically, the diameter relative to through hole 52a, 46a, the diameter of the shaft body 73a of axis 73 Become smaller, thus, it is possible to form clearance D 1, D3.

By the way that clearance D 1, D3 is arranged, the contact area of axis 73 and the first and second mounting portions 52,46 is reduced, in the gap D1, D3 can discharge the heat from curtain-shaped cover member 5.Especially as shown in figure 11, if in the second mounting portion of curtain-shaped cover member 5 Between 46 and axis 73, clearance D 3 is formed in workpiece W weld side, the space for being formed with the clearance D 3 is acted as insulated space With.Thereby, it is possible to further reduce from curtain-shaped cover member 5 by the heat of axis 73 towards the protection cap 40 of accommodating case 3 to transmit.

Although here, the first and second mounting portions 52,46 through hole 52a, 46a both sides formed clearance D 1, D3, Gap can be formed in either through hole 52a, 46a.Thereby, it is possible to further reduce from the part for being formed with gap Towards the heat transmitting of the protection cap 40 of accommodating case 3.

Moreover, clearance D 1, D3 are and the diameter relative to through hole 52a, 46a by axis among present embodiment The diameter of 73 shaft body 73a becomes smaller and is formed.In addition to this, for example, can also by the diameter of the shaft body 73a of axis 73 with The diameter of through hole 52a, 46a are identical, and form recess portion in the position positioned at through hole 52a, 46a of shaft body 73a, are come with this Form clearance D 1, D3.

Moreover, mode more preferably is mounted on by curtain-shaped cover member 5 as shown in figure 11 among present embodiment In the state of the protection cap 40 of accommodating case 3, clearance D 2 is formed between the plate-like portion 51 and accommodating case 3 of curtain-shaped cover member 5.Again plus On, clearance D 4 is formed between the plate-like portion 51 and inducing component 6 of curtain-shaped cover member 5 (referring to Fig. 8).In addition, in this embodiment party Among formula, clearance D 2 is to pass through the plate of curtain-shaped cover member 5 in the state that curtain-shaped cover member 5 to be mounted on to protection cap 40 of accommodating case 3 A part of shape portion 51 and protection cap 40 is abutted against and is formed.The installation condition of curtain-shaped cover member 5 can be stablized as a result,.But It can be complete with the plate-like portion 51 of curtain-shaped cover member 5 and protection cap 40 by the positional relationship of aftermentioned elastomeric element 75 and axis 73 The mode left forms clearance D 2.

Pass through the clearance D 2 formed between the plate-like portion 51 of curtain-shaped cover member 5 and protection cap 40 (accommodating case 3), curtain-shaped cover member It is heat-insulated between 5 plate-like portion 51 and protection cap 40.Moreover, by between the plate-like portion 51 and inducing component 6 of curtain-shaped cover member 5 The clearance D 4 of formation, it is heat-insulated between the plate-like portion 51 and inducing component 6 of curtain-shaped cover member 5.Like this, it is transmitted to curtain-shaped cover member 5 Radiant heat be difficult to be directly delivered to the box main body 30 of accommodating case 3 from curtain-shaped cover member 5, radiant heat can be made to be difficult to pass through induction portion Part 6 indirectly transmits.

Here, can determine size and the position of axis 73 and through hole 52a, 46a in a manner of forming clearance D 2 and D4 It sets, but among present embodiment, is stably formed clearance D 2, D4 using following elastomeric elements 75.

Specifically, being equipped with elastomeric element 75 in accommodating case 3, curtain-shaped cover member 5 is being mounted on 3 (protection of accommodating case Lid 40) in the state of, which exerts a force curtain-shaped cover member 5 to workpiece W weld side.More specifically, elastomeric element 75 For curved metal sheet, it is mounted on the second mounting portion 46 for constituting the protection cap 40 of accommodating case 3.

Elastomeric element 75 is being in contact to the convex curved bending part 75a in 5 side of curtain-shaped cover member with curtain-shaped cover member 5, and It is kept with the state of flexible deformation, curtain-shaped cover member 5 is exerted a force using its recuperability.Among present embodiment, bullet is being utilized Property component 75 will curtain-shaped cover member 5 exert a force in the state of, between accommodating case 3 and the plate-like portion 51 of curtain-shaped cover member 5 formed clearance D 2, Clearance D 4 is formed between inducing component 6 and the plate-like portion 51 of curtain-shaped cover member 5.By clearance D 2, D4, can make from curtain-shaped cover member 5 are difficult to transmit towards the heat of accommodating case 3.In addition, using elastomeric element 75, in the state of forming the gap, by shielding portion Part 5 flexibly exerts a force, and elastomeric element 75 works as padded coaming, so being able to suppress the breakage of curtain-shaped cover member 5.And And curtain-shaped cover member 5 is in contact with the bending part 75a of elastomeric element 75, so can reduce curtain-shaped cover member 5 and elastomeric element 75 Contact area, the heat from curtain-shaped cover member 5 can be made to be difficult to be transmitted to accommodating case 3 by elastomeric element 75.

Moreover, by the way that curtain-shaped cover member 5 is exerted a force using elastomeric element 75, due to forming clearance D 2, D4, such as even if external force It is applied to curtain-shaped cover member 5, and clearance D 2, D4 are crushed out of shape, but pass through the recuperability (force) of elastomeric element 75, it can be by gap D2, D4 are re-formed.Especially gap is formed between through hole 52a, 46a and axis 73 of the first and second mounting portions 52,46 When the case where D1, D3, clearance D 1 between axis 73 and through hole 52a, 46a, D3 can be stably kept.Like this, if bullet Property component 75 curtain-shaped cover member 5 can be exerted a force, elastomeric element 75 or the elastomer such as rubber or resin.

Here, when the case where curtain-shaped cover member 5 being made of ceramic material, since ceramic material is fragile material, if impact The effects of load, then curtain-shaped cover member 5 was easy to happen the breakage of shortcoming etc. in curtain-shaped cover member 5.But among present embodiment, Using elastomeric element 75, in the state of forming clearance D 1 to D4, curtain-shaped cover member 5 is flexibly exerted a force.Elastomeric element 75 as a result, It works as buffer function in the padded coaming of the impact load of curtain-shaped cover member, so being able to suppress the broken of curtain-shaped cover member 5 Damage.

As described above, forming the shape of clearance D 2 between the plate-like portion 51 and accommodating case 3 (protection cap 40) of curtain-shaped cover member 5 State, it can be the plate-like portion 51 and 3 Entirely contactless state of accommodating case of curtain-shaped cover member 5, be also possible to part of it and be in contact State.Among present embodiment, curtain-shaped cover member 5 is being mounted on accommodating case as shown in figure 11 by mode more preferably In the state of 3 protection cap 40, it is formed with clearance D 2 between the plate-like portion 51 and protection cap 40 of curtain-shaped cover member 5, and in plate The end 51c in the direction for leaving workpiece W in portion 51 and be in contact with protection cap 40.As a result, while ensuring clearance D 2, in plate The end 51c in the direction for leaving workpiece W in shape portion 51 is in contact with protection cap 40, so it can be stably installed curtain-shaped cover member 5, And heat is difficult to be transmitted to protection cap 40 from curtain-shaped cover member 5.

In such a state, as described above, being formed with the second gas stream for flowing gas internally in protection cap 40 Road 47 forms oriented single direction in second gas flow path 47 and extends multiple fins.Protection is transmitted to from curtain-shaped cover member 5 as a result, The heat of lid 40 is formed on multiple fin 47m release of second gas flow path 47.It is flowing in by the heat that fin 47m discharges The gas of second gas flow path 47 discharges.As a result, the temperature of protection cap 40 is difficult to increase, sensor unit 2 is difficult to be heated.

In particular, among present embodiment, mode more preferably, the end 51c and protection cap 40 of plate-like portion 51 Before 40a abut against.The side that second gas flow path 47 is flowed with gas from the side 40a before protection cap 40 to the back side side 40b Formula and formed, so, the 40a before protection cap 40, can will from be in contact 51 end 51c of plate-like portion transmitting come heat Effectively discharge.Moreover, because being formed in the fin 47m of second gas flow path 47 also before the high protection cap 40 of temperature The side 40a extends to the low back side side 40b of temperature, so can more effectively discharge the heat for being transmitted to fin 47m.

Among present embodiment, curtain-shaped cover member 5, to be blown into masking with the gas that discharge outlet 48b gives off from detection Component 5 and the mode flowed to the opposite side of workpiece W weld side, relative to the flowing for passing through the detection gas of discharge outlet 48b Direction and tilt.The gas straight along flow direction with discharge outlet 48b from detection, the plate-like portion with inclined curtain-shaped cover member 5 51 back side 51b phase is collided.The gas discharged as a result, from detection with discharge outlet 48b is blown into curtain-shaped cover member 5, so can Utilize gas cooling curtain-shaped cover member 5.Moreover, being blown into the gas of curtain-shaped cover member 5, flowed to the opposite side of workpiece W weld side, institute It is difficult to flow to workpiece W weld side with gas.As a result, in the welding position of workpiece, it can reduce and arranged from detection discharge outlet 48b The influence for the gas (flowing) put, can steadily be welded.

6. about inducing component 6

Sensor device 1 can also further have inducing component 6.Inducing component 6 and curtain-shaped cover member 5 are made jointly With, in a manner of surrounding protection cap together with curtain-shaped cover member 5 and along laser L1 be projected side extend (referring for example to Fig. 3, Figure 12 Deng).It is, forming nozzle by inducing component 6 and curtain-shaped cover member 5, which will be from discharge outlet (projection discharge outlet 48a There is the side workpiece W of laser L1 to induce to projection with the gas of detection discharge outlet 48b) discharge.Inducing component 6 by metal material or Ceramic material is constituted, and among present embodiment, as the preferred material of inducing component 6, such as can enumerate brass.Due to luring It leads component 6 to be made of brass, the infrared ray generated when welding can be reflected.Since inducing component 6 and curtain-shaped cover member 5 are made jointly With, protection cap 40 is surrounded together with curtain-shaped cover member 5, is spread so being able to suppress gas to 40 surrounding of protection cap, it can be by gas Side (workpiece side that will namely start welding) induction is projected to laser L1.In addition, by setting inducing component 6, energy Enough reduce influence of the noise of the side workpiece W generation to sensor unit 2.

Moreover, among present embodiment, as shown in figure 12, inducing component 6 is to surround the horizontal side of a pair of protection cap 40 The mode of 40c, 40c and back side 40b and formed, be formed with clearance D 5 between inducing component 6 and each horizontal side 40c.

Further specifically, inducing component 6 has: being formed in the transverse slat with each relative position horizontal side 40c Portion 61；And it is connect with lateral piece 61 and is formed in the backboard portion 63 with the back side relative position 40b.In the horizontal side of protection cap 40 Between 40c and the lateral piece 61 of inducing component 6 corresponding thereto, it is formed with above-mentioned clearance D 5.In backboard portion 63, being formed with will be protected The notch section 63a that the case 41 of protecting cover 40 is pulled out (referring to Fig. 3).

Like this, among present embodiment, pass through the horizontal side 40c and inducing component corresponding thereto in protection cap 40 The clearance D 5 that 6 lateral piece 61 is formed, can interdict when welding it is generated, from inducing component 6 towards the radiation of protection cap 40 The transmitting (referring to Fig.1) of hot H.Moreover, passing through the stream from projection with discharge outlet 48a and detection discharge outlet the 48b gas discharged Dynamic, clearance D 5 nearby becomes negative pressure.As a result, by the lateral piece 61 of inducing component 6 and each horizontal side 40c of protection cap 40 it Between the clearance D 5 that is formed, gas (atmosphere) is inhaled by 5 institute of inducing component 6 and curtain-shaped cover member near the side of box main body 30 In the space surrounded.By the flowing of the sucking gas, it is able to suppress from projection discharge outlet 48a and detection discharge outlet 48b Flowing of the gas of discharge towards the direction more more outward than the horizontal side 40c of protection cap 40.

Among present embodiment, the edge part 61a of the workpiece W weld side of lateral piece 61, with from 5 side of curtain-shaped cover member to Backboard portion 63 is close, to tilt to the close mode of protection cap 40 (referring to Fig. 3).The gas discharged as a result, is easy to workpiece W The opposite side (rear side) of weld side flows.

Moreover, inducing component 6 is mounted on the back side of protection cap 40 by the installation parts such as screw 76 in backboard portion 63 40b.Specifically, as shown in figure 11, the notch section 66 for being put into axis 73 is formed in inducing component 6, axis 73, which is contained in, to be formed in The notch section 66 of inducing component 6.When removing inducing component 6, two installation parts 76,76 are removed first, by shaft body 73a It is unclamped with screw body 73b.Secondly, axis 73 is just pulled out from notch section 66, Neng Gourong if inducing component 6 rearward extracted It changes places and removes inducing component 6 from sensor device 1.As a result, in the state that curtain-shaped cover member 5 is mounted on protection cap 40, and It, being capable of check protection lid 40 in the state of removing inducing component 6 from protection cap 40.

Among present embodiment, pass through the transverse slat of horizontal side 40c and inducing component 6 corresponding thereto in protection cap 40 Portion 61 formed clearance D 5, can interdict when welding it is generated, from inducing component 6 towards the biography of the radiant heat H of protection cap 40 It passs.In addition, the installation part 76 will not be directly exposed to workpiece W welding since installation part 76 is located at the opposite side of workpiece W weld side When generated radiant heat.As a result, also can reduce heat even if inducing component is heated by radiant heat and pass through protection cap 40 Heating is contained in the sensor unit 2 of box main body 30.

As described above, according to the present embodiment, by curtain-shaped cover member 5 and each clearance D 1 to D5, can reduce sensor The transition of unit 2 is heated.Thereby, it is possible to carry out stable measurement by sensor unit 2.

7. the mounting and detaching structure about case 41

As shown in fig 6 and fig 13, in the state that holder 45 is mounted on box main body 30, case 41 is relative to holder 45 and detachably engage.Specifically, in the state of being kept part 45 and keeping, relative to holder 45, case 41 with Block from the mode that holder 45 can be extracted with holder 45 from the side 40a before protection cap 40 to back side 40b Slideslip It closes.

More specifically, as shown in fig. 6, being equipped with bending in a manner of being formed with protrusion 49a in holder main body 45a Flat spring 49, engaged by the protrusion 49a of flat spring 49 with the recess portion 41a of case 41, case 41 can be maintained at holding Part 45.On the other hand, case 41 has handle part 41b in the back side of protection cap 40.Handle part 41b is being held and by case 41 from holder 45 when extracting, due to elastic 49 flexible deformations of plate, so can easily release the protrusion 49a of flat spring 49 with The engaging of the recess portion 41a of case 41.

It like this,, can be by case 41 before protection cap 40 relative to holder 45 among present embodiment The side 40a to welding when be difficult to the back side 40b Slideslip being heated.Then, it is not required to mind remaining heat after welding, it can be by casket Son 41 is promptly pulled out from holder 45, can replace protection cap 40.

As shown in figure 13, in the state that holder 45 is mounted on box main body 30, holder 45 and box main body 30 it Between, it is formed with the receiving recess portion 48 for accommodating case 41, is accommodating recess portion 48, overleaf, is formed with the insert port of insertion case 48d.In addition, among present embodiment, as its preferred mode, when planar observation, case 41 is asymmetrical shape, is accommodated Recess portion 48 is formed in a manner of corresponding with the shape.Even if case 41 is contained in the state to turn upside down as a result, Receive recess portion 48, case 41 can not also be inserted into the depths for accommodating recess portion 48.With this, being erroneously inserted for case 41 can be prevented.

Moreover, when taking out case 41, recess portion 48 is being accommodated among present embodiment, even if case 41 is stuck, For example, as shown in figure 4, by removing the holder 45 of protection cap 40 from box main body 30, case 41 can expose, can be easily Case 41 is removed.Moreover, can confirm whether case 41 is inserted in receiving recess portion from the back side for being formed with insert port 48d 48。

Case 41 has protection board 44 and case main body 42, and protection board 44 is by clip 41c with free from case main body 42 The mode of disassembly and be maintained at case main body 42.As shown in figure 14, in the bottom 42d of case main body 42, it is formed through hole 42e.Protection board 44 is pressed up by through hole 42e finger as a result, protection board 44 can be made from case main body 42 with this Float, can easily take out protection board 44 from case main body 42.In addition, case main body 42 be formed with notch section 42c and Notch section 42b, notch section 42c pass through projection laser L1, and notch section 42b passes through detection laser L2.

The transparent material that the material of protection board 44 preferably transmits laser L1, L2 can enumerate glass, tree as its material Rouge etc..Protection board 44 has: the covering projection projection protection portion 44a for passing through portion 36a；And covering detection is with passing through portion The detection of 36b protection portion 44b.Moreover, in-between, in the state that protection board 44 is maintained at case main body 42, protecting Backplate 44 is formed with the observation portion 44c (referring to Fig.1 5) that observation protection board 44 whether there is.Among present embodiment, if made Industry personnel are able to confirm that the presence of protection board 44, and observation portion 44c is for example also possible to coloured part, or can also be by not Transparent material is covered.

Among present embodiment, mode more preferably, observation portion 44 is the part for being coated with metal film, the metal Film is made of the metal material of aluminium foil etc..By the way that observation portion 44c is arranged, it can easily observe protection board 44 and be arranged in case 41, so can prevent from forgetting protection board 44 being mounted on case main body 42.

Among present embodiment, in the state that case 41 are installed, use through portion 36a in the projection of box main body 30 and Detection is covered each by projection the protection portion 44a and detection protection portion 44b of protection board 44 with by portion 36b.As a result, can The flue dust etc. generated when enough inhibition welding is invaded to project and be used with by portion 36a and detection through portion 36b.

Like this, as shown in Fig. 4 and Figure 16 A to Figure 16 C etc., protection cap 40 will be projected and be used with by portion 36a and detection It is mounted on box main body 30 in the way of making to swash the light transmissive covering of protection board 44 portion 36b, so protection can be utilized Plate 44 protects them.

In addition, case 41, which is detachably fastened on, is installed on box main body as described above, protection board 44 is assemblied in case 41 30 holder 45, and kept by the holder 45.Then, it is installed on the case 41 of box main body 30 by loading and unloading, can be easy Ground replaces protection board 44 and case 41 together, can be improved the maintainability of device.

8. the detection about protection cap constructs

As described above, among present embodiment, in the state that case 41 is maintained at holder 45, in box main body 30 It is provided with the plate detection sensor 23 (referring to Fig.1, Figure 15 and Figure 16 A) of detection protection board 44.

As shown in Fig. 1 and Figure 16 A, plate detection sensor 23 be by observation portion 44c irradiating and detecting laser L and will see The detection for examining portion 44c reflection is detected with laser L, detects the sensor that protection board 44 whether there is with this.Then, it is detected from plate The detection laser L that sensor 23 issues, is irradiated to observation portion 44c by portion 36c by box main body 30.In present embodiment Among, observation portion 44 is the part for being coated with the metal film being made of the metal material of aluminium foil etc., so, it is irradiated to observation portion The detection laser of 44c is reflected.The detection that observed portion 44 is reflected with laser L towards plate detection sensor 23, so, plate inspection It surveys sensor 23 and is able to detect detection laser L.Depositing for protection board 44 can be judged by plate detection sensor 23 as a result, In.Like this, observation portion 44 undertakes two functions of observation and detection, and apparatus structure can be made to become simple.

Here, among present embodiment, mode more preferably is formed with above-mentioned through hole in case main body 42 42e (referring for example to Figure 14 and Figure 16 C), through hole 42e make the detection of irradiation in the state of not keeping protection board 44 Passed through with laser L and is located at the position covered by above-mentioned observation portion in the state of keeping protection board 44.Moreover, keeping Part has and prevents reflecting part, this prevents reflecting part from preventing through the detection of through hole 42e with laser L towards plate detection sensor 23 Reflection.Herein, if it is possible to prevent above-mentioned reflection, the tool for making detection laser L irregular reference can be enumerated by preventing reflecting part for example There is the surface of minute asperities, or the through hole etc. for passing through detection laser L.Among present embodiment, prevent reflecting part from being It is formed in the coniform recess face 48c of the holder main body 45a of holder 45.By the way that recess face 48c is arranged, can make to examine Survey is reflected with laser L to the direction different from plate detection sensor 23.

Like this, as shown in Figure 16 B and Figure 16 C, when unloading case 41, from the detection of the sending of plate detection sensor 23 With laser L, pass through the coniform recess face 48c that holder 45 is irradiated to by portion 36c of box main body 30.It is irradiated to as a result, The detection laser L of recess face 48c will not be reflected to plate detection sensor 23, so, it is not detected by plate detection sensor 23.Its As a result, can judge that (detection) protection board 44 is not present by plate detection sensor 23.

In addition, similarly, as shown in figure 16 c, even if being inserted into case main body 42 in the state that protection board 44 is not present When situation, the detection laser L irradiated from plate detection sensor 23 is irradiated to guarantor by the through hole 42e of case main body 42 The recess face 48c of gripping member 45.The detection laser L for being irradiated to recess face 48c as a result, will not be reflected to plate detection sensor 23, So not detected by plate detection sensor 23.As a result, can judge (detection) protection board 44 not by plate detection sensor 23 In the presence of.Like this, among present embodiment, case main body 42 is whether installed, passes through the coniform recessed of holder 45 Wall surface 48c can judge being not present for protection board 44.

Embodiments of the present invention are described in detail above, still, the invention is not limited to above-mentioned embodiment party Formula can carry out various set to the present invention within the scope of not departing from present inventive concept documented by claim Meter change.

Among present embodiment, although sensor unit to workpiece project laser, using the laser reflected from workpiece as Detection light and receive, and the state (shape) for measuring workpiece and the distance from test section to workpiece, still, for example, sensor list Member can also be by photographic device (camera) using the light caused by the workpiece when light reflected from workpiece or welding as detection light And image, to detect the welded condition etc. of workpiece.

Symbol description

1:(welding is used) sensor device；2: sensor unit；21: projection unit；22: test section；23: plate detection sensing Device；3: accommodating case；30: box main body；35: first gas flow path；36a: projection is with passing through portion；36b: detection is with passing through portion；40: protecting Protecting cover；41: case；42: case main body；44: protection board；44a: protection portion is used in projection；44b: protection portion is used in detection；45: keeping Part；45a: holder main body；45f: separator；46: the second mounting portions；46a: through hole；47: second gas flow path (gas stream Road)；47b: slit (venthole)；48: accommodating recess portion；48c: recess face (prevents reflecting part)；48d: insert port；5: shielding portion Part；51: plate-like portion；52: the first mounting portions；52a: through hole；6: inducing component；73: axis；75: elastomeric element；D1,D2,D3, D4, D5: gap；L1, L2: laser；W: workpiece.

Claims

1. a kind of welding sensor device, which is characterized in that at least have:

Sensor unit, the sensor unit measure the state of welding workpiece or the distance to the workpiece；And

Containing body with receiving portion and shielding portion, the receiving portion accommodate the sensor unit, work described in the shielding part shields Towards the radiant heat of described accommodation section among generated radiant heat when part welds,

The shielding portion is made of the low material of the material of thermal conductivity ratio described accommodation section.

2. welding sensor device according to claim 1, which is characterized in that

Using described accommodation section as accommodating case, the shielding portion is mounted in the curtain-shaped cover member of the accommodating case,

It is formed with plate-like portion and mounting portion in the curtain-shaped cover member, which is extended in a manner of covering the radiant heat, The curtain-shaped cover member is mounted on institute at the back side of the plate-like portion for the opposite side for being located at the workpiece weld side by the mounting portion Accommodating case is stated,

In the back side of the plate-like portion, the curtain-shaped cover member is mounted on the accommodating case by the mounting portion.

3. welding sensor device according to claim 2, which is characterized in that

In the state that the curtain-shaped cover member is mounted on the accommodating case, the curtain-shaped cover member the plate-like portion with it is described Gap is formed between accommodating case.

4. welding sensor device according to claim 3, which is characterized in that

Using the mounting portion of the curtain-shaped cover member as when the first mounting portion, in the accommodating case, towards the plate The back side in portion is formed with the second mounting portion for installing the curtain-shaped cover member,

It is formed with the through hole of insert installation axis in first mounting portion and second mounting portion,

The curtain-shaped cover member, by the way that the axis is inserted the through hole of the mounting portion and running through for the accommodating case Hole, and it is mounted on the accommodating case.

5. welding sensor device according to claim 4, which is characterized in that

At least one party's runs through among the through hole of the through hole of first mounting portion and second mounting portion Between hole and the axis, it is formed with gap.

6. welding sensor device according to claim 3, which is characterized in that

Elastomeric element is installed in the accommodating case, the elasticity in the state that curtain-shaped cover member is mounted on the accommodating case Component exerts a force the curtain-shaped cover member to the workpiece weld side,

In the state that the curtain-shaped cover member is exerted a force using the elastomeric element, in the accommodating case and the curtain-shaped cover member The gap is formed between the plate-like portion.

7. welding sensor device according to claim 3, which is characterized in that

The curtain-shaped cover member is made of ceramic material.

8. welding sensor device according to claim 3, which is characterized in that

The sensor unit at least has test section, which examines the light from welding workpiece surface as detection light It surveys,

The accommodating case has box main body and protection cap, which, which accommodates the sensor unit and be formed with, makes towards institute State at least one that the detection light of test section passes through by portion, which has and makes the light transmissive protection board of detection simultaneously To be mounted on the box main body in such a way that protection board covering is described by portion,

The curtain-shaped cover member is mounted on the protection cap.

9. welding sensor device according to claim 8, which is characterized in that

In the state that the curtain-shaped cover member is mounted on the accommodating case, the curtain-shaped cover member the plate-like portion with it is described The gap is formed between protection cap, and in the end in the direction for leaving the workpiece of the plate-like portion and with the protection Lid is in contact,

It is formed with the gas flow path for flowing gas internally in the protection cap, forms oriented single side in the gas flow path To the multiple fins of extension.

10. welding sensor device according to claim 9, which is characterized in that

Relative to the welding sensor device, using the surface positioned at the workpiece weld side of the protection cap as institute It states before protection cap, using the surface of its opposite side as when the back side of the protection cap,

The end of the plate-like portion is abutted against with the front of the protection cap,

The gas flow path is formed in such a way that gas is from the front side of the protection cap rearwardly side flowing,

The fin from the front side of the protection cap support or oppose surface side extend.

11. welding sensor device according to claim 8, which is characterized in that

Be provided with separator between the box main body and the protection cap, separator box main body as described in thermal conductivity ratio and The low material of the material of the protection cap is constituted.

12. welding sensor device according to claim 1, which is characterized in that

The sensor unit, the detection light detected by the test section, come measure the workpiece state or from The test section to the workpiece distance,

The welding sensor device has box main body and protection cap, which accommodates the sensor unit and formed Have at least one for passing through the detection light towards the test section by portion, which has and makes the detection light transmission Protection board and by by the protection board cover it is described by portion in the way of be mounted on the box main body,

The protection cap has: the case with the protection board；And it keeps the case and is mounted on the box main body Holder, in the state that the holder is mounted on the box main body, the case loads and unloads certainly relative to the holder Such as engage.

13. welding sensor device according to claim 12, which is characterized in that

Relative to the welding sensor device, in setting the welder for being located at the welding workpiece of the protection cap Set the surface of side as before the protection cap, using the surface of its opposite side as when the back side of the protection cap,

In the state of being kept by the holder, the case with relative to the holder from the front side of the protection cap Rearwardly Slideslip and engage from the mode that the holder can be extracted with the holder.

14. welding sensor device according to claim 13, which is characterized in that

In the state that the holder is mounted on the box main body, between the holder and the box main body, formed There is the receiving recess portion for accommodating the case,

In the receiving recess portion, at the back side, it is formed with the insert port for being inserted into the case.

15. welding sensor device according to claim 12, which is characterized in that

The case has the case main body for keeping the protection board, in the shape that the protection board is maintained to the case main body Under state, the observation portion that whether there is for observing the protection board is formed in the protection board.

16. welding sensor device according to claim 15, which is characterized in that

In the state that the case is maintained at the holder, the plate for detecting the protection board is provided in the box main body Detection sensor.

17. welding sensor device according to claim 16, which is characterized in that

The observation portion is to be coated with the part of metal material in the protection board, and the plate detection sensor is the detection sight Examine the sensor in portion.

18. welding sensor device according to claim 17, which is characterized in that

The plate detection sensor be by the observation portion irradiating and detecting laser and by the observation portion reflect detection The sensor that the protection board whether there is is detected with this with laser detection,

It is formed through hole in the case main body, which makes irradiation in the state of not keeping the protection board The detection laser passes through and is located in the state of keeping the protection board position covered by the observation portion,

For the holder with reflecting part is prevented, this prevents reflecting part from preventing the detection laser court by the through hole It is reflected to the plate detection sensor.